Every year, I buy a mustard at Honey Baked Ham, Honey Mustard.
It's wonderful as a dip for Chicken fingers, used in a homemade vinaigrette, a great glaze for fish, chicken or ham, pre-coating on all matter of protein prior to breadcrumbs and frying, etc.
This mustard has a fabulous sweet-sour-tart-spicy flavor, but not over powering at all.
One bottle of it goes a long way.
Oh and @Koukouvagia, great topic! MAHALO!